Just wondering, those intestinal crypts (tubular glands), I know they have secreting cells, that secrete intestinal juice, but just wondering which cells?Are there also S cells that secrete secretin? or is this the same as enteroendocrine cells, as I know these cells secrete secretin as well... What about I (aj) cells, dont they secrete CCK? but again I know that also enteroendocrine cells secrete CCK?

So which cells would then secrete intestinal juice in the intestinal crypts?Also duodenal glands (Brunners glands) - they secrete mucus as well...what kind of cells do they have? do they have goblet cells there?

Differentiated crypt Paneth cell. Unlike other lineages, Paneth cells migrate to the crypt base. They have a long life-span of ~28 days. Paneth cells are noted for their prominent secretory appartus. Granules are readily visulaized using a variety of stains including the Phloxine-Tartrazine histochemical stain. The granules contain digestive enzymes (phospholipases, peptidases), mucins and anti-microbial factors such as lysozyme, the defensin-related cryptdins and IgA taken up from lamina propria plasma cells. As all products enter the crypt lumen, these cells provide a primary defense to microbial colonization in this sensitive regions of the small intestine. Only mammalian herbivores and omnivores have Paneth cells.